A.O. Smith HPW-60AT User manual

Heat Pump Water Heater
HPW-60/80AT
User Guide
HPW-60/80AE

About A. O. Smith
In 1936, A. O. Smith developed and patented the process of
glass-lined water heaters, pioneering the modern standard in
water heater design. Over the past years, A. O. Smith has
gained respect and support of homeowners, contractors,
architects, and specifying engineers in over 60 countries by
providing innovative, energy-saving products designed for
years of trouble-free service.
A. O. Smith Water Products Company, now the largest water heater
manufacturer in the world, continues the tradition of innovation and
becomes a global leader in water product industry.

......................................................................................................................13
.......................................................................................................................9
Contents
User Guide
Physical Characteristics
......................................................................................................................3
Safety
Feature ........................................................................................................................................4
High Temperature Limit Protection Switch
...................................................................................4
............................................................................................................................................1
Safety Valve ·
..................................................................................................................................4
Tri - polar Power
-off Protection System
..........................................................................................4
ProductFeatures
Energy - saving Heating
Electronic Controller
Glass
-
lined Protection Tank
Anode Protection
High Efficiency Energy-saving Insulation
Installation Instructions .......................................................................................................................5
Mounting ....................................................................................................................................5
Mounting Procedures and Precautions
Mounting Consolidation
...............................................................................................................7
Pipe Connection·
..........................................................................................................................8
Three-pass Discharge Pipe Connection
........................................................................................8
Condensate Water Pipe Connection
.............................................................................................8
Power Connection
.......................................................................................................................8
Water Filling
...............................................................................................................................9
Remote Controller
Operation Instructions
Electronic Controller Operation
Electric Leakage Inspection
......................................................................................................................10
Safety Valve Inspection
.................................................................................................13
Remote Controller
Maintenance Instruction
Maintenance
Troubleshooting
Wiring Diagram
Warning
Part List
...........................................................................................................5
...................................................................................................................................4
..................................................................................................................4
.....................................................................................5
..........................................................................................................................5
.......................................................................................6
.....................................................................................................................4
...............................................................................................10
.............................................................................................................13
.....................................................................................................................14
.............................................................................................................................14
.........................................................................................................................15
..........................................................................................................................16
.............................................................................................................................................17
...............................................................................................................................................17

1
User Guide
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Only professional installers acknowledged by A.O.SMITH are permitted to install the heat pump
water heater. Ifthe water heater is installed with self-prepared installation materials or by
un-authorized personnel, A.O.SMITH will not be responsible for all losses incurred thereby,
including but not limited to pipeline leakage, fall or improper installation that may affect normal
operation and performance of water heater.
The heat pump water heater is for residential application. Therefore, it may affect life expectation
if it is used for commercial application.
After installation and operation of the heat pump water heater, users should inspect the system regu-
larly and make necessary maintenance according to operation conditions. If any abnormality
occurs, please stop operation immediately, and contact local authorized dealer for repair to ensure
the normal, safe, and reliable operation of the water heater.
The anode rod is a consumable part and it is generally suggested to check and replace the anode rod
every 2 or 3 years. Users could contact the local authorized dealer for check and replacement to
extend life expectation of water heater.
Prior to any maintenance or repair of the heat pump water heater, please cut off power supply.
Unauthorized personnel are not permitted to adjust and repair the heater.
In case of any component soaked by water, the water heater is not permitted to use until checked by
authorized service staff.
Main components of the heat pump water heater are protected by insulation material to ensure
safety use. Any damaged power cords should be replaced by authorized service staff.
The pressure relief valve, equipped on the heat pump water heater, is forbidden to change installa-
tion position or be blocked. Discharge pipe is required to connect the valve and down toward floor
drain.
In case of any fault in ground wire circuit, tri-polar power-off protection system will cut off all
connection between water heater and electric supply circuit instantaneously. Please stop using, pull
the plug, and contact local authorized dealer.
Water, including hot water, out of the heat pump water heater is not permitted for drinking.
Electricity for the heat pump water heater should be supplied by independent branch of circuit, of
which electricity meter, breaker, maximum current need to be checked by professional
electrician in advance.
Power socket should be located at a dry place, and power cord should not be pushed or pulled with wet hand
to avoid the danger of electric shock.

2
z
Damaged electric wire, aged, loose and unfixed socket are not suggested to be used because of the
danger of electric shock, short circuits, fires, etc. Please ensure power cord and socket could be
connected well.
A. O. SMITH (China) water Heater Company Ltd reserves the rights to explain all provisions men-
tioned above.
Caution: Failure to follow instructions in the user guide may cause fire disaster, which would
be a threat to life and property security.
Warning:
Heat pump water heater is not permitted for use without reliable ground wire
circuit for power socket. In case of indicator lighted up for “ground wire circuit
fault”, please immediately stop using, pull plug and contact local authorized
dealer. Well-drained floor drain is essential to prevent the damage to surround-
ings or downstairs in case of leakage of heater or joint.

3
Table 2 Specifications
220~/60 HPW-60AT
HPW-80AT
MAX MAX
（W）
Model
(L)
Rated Voltage (V)
/
Rated Frequency
（Hz）
（W)
（A)
60
80 220~/60
210/0.95
210/0.95 2210/10
2210/10 540
540
2540
2540
3000
3000
3000/13.7
3000/13.7
Rated
Capacity
Rated Input Power
/Rated Electric Current
Eciency
Mode Hybrid Turbo
Mode Eciency
Mode Hybrid Turbo
Mode
Table 1 Outline Dimensions
HPW-60AT/AE
HPW-80AT/AE
L (mm)
837
992
S (mm)
473
473
S1 (mm)
241
241
S2 (mm)
465
465
L1 (mm)
290
344
Outlet pipe (hot)
Inlet pipe (cold) Relief valve
Condensate pipe
Rated Heating Output
Fig. 1 Appearance Features
Model
Specifications
Physical Characteristics
（Mpa）（℃） （℃） （℃） （g）(dB(A)) (kg)
HPW-60AT/AE
HPW-80AT/AE
0.8
0.8
35~75
35~75
10~44
10~44
10~55
10~55
R134a
R134a
123
123
≤40
≤40
42
45
Table 3 Specifications
Model
Water Temp
Range
Rated Tank
Pressure
Ambient Temp
Range in Ecienc
Mode
Water Temp
Range in
Eciency Mode Refrigerant
Refrigerant
Charge Volume
Noise
Level
Net
Weight
220~/5060
80 220~/50
210/0.95
210/0.95
1010/4.6
2210/10 540
540
2540
1340
3000
3000
3000/13.7
1200/5.5
HPW-80AE
1340
1340
2540
1340
3000/13.7
1200/5.5
2210/10
1010/4.6
HPW-60AE

4
Safety Feature
High Temperature Limit Protection Switch
-
Tri-polar Power-off Protection System
Product Features
Energy-saving Heating
Fig. 2 Electronic Controller
Electronic Controller
Mode
User could select Efficiency mode or Hybrid Turbo mode. The factory default setting is Efficiency
mode, an energy-saving mode, and Hybrid Turbo mode is both energy-saving and rapid heating.
AES (Adaptive Energy-saving System)
By recording and learning user’s habit of water usage, patented AES feature adopts heating cycles
automatically, which will facilitate water usage and save energy by minimizing thermal loss.
.
A high temperature limit protection thermal cutout is equipped on the heat pump water heater. The switch
cuts off the phase and neutral line instantaneously and simultaneously to guarantee safety in case water
temp reach the high temp limited due to water heater fault. If this happens, please contact local authorized
dealer.
Safety Valve
A safety valve shown in fig.1 (Model G1/2-0.8, default 0.8MPa, not adjustable by user) is equipped
on inlet tube of heat pump water heater. The valve will relieve pressure automatically when piping
system pressure exceeds the setting point. Discharge pipe is required to connect the valve in a frost-
less environment and down toward floor drain, and in any case should the pipes or the three-pass
discharge pipes be blocked (For installation of safety valve, refer to Fig. 7).
In case of any fault in ground wire circuit, tri-polar power-off protection system will cut off all
connection between water heater and electric supply circuit instantaneously.
A new generation water heater, heating residential water by air-source based on the Inverse Cano
Principle.

5
MAX
MAX function means more hot water output, therefore, better bath experience. .
Program
Program is to set up clock, and timing for heating. Two timers is available.
Hot Water Amount Display
Five light blocks visibly indicate the hot water amount available in tank.
Power-off Memory
By power-on more than 4 hours, the water heater could keep setting information for 72 hours when
power supply is cut-off.
Glass - lined Protection Tank
.
Anode Protection
High Efficiency Energy-saving Insulation
A polyurethane foam insulating layer without Freon reduces heat loss effectively.
Caution:
.
Installation Instructions
Caution:
The initial power on should be over 30 minutes after installation.
Mounting
The Glass-lined protection tank is a patent by A.O.Smith, coating tank with Silicide smoothly and
fusion at 870℃. The anti-rust and anti-scaling glass coating has pass 100,000 cycles fatigue life test
in accordance with relevant UL Standards.
A powerful steel-core-anode rod is used to protect tank and greatly prolong service life of the heat
pump water heater.
Hot water over 50℃has the risk of causing scald. Please do take care of your
family when settingtemp over 50℃.
2 or more staffs are needed to move or install the heat pump water heater due to the heavy
weight.
Plastic components on both left and right side can not afford overexertion, please take good
care. Neither tiling over 45° angle nor vertical placing is permitted.Disassembly and assembly
by users or unauthorized personnel are prohibited.
The heat pump water heater should be installed at a location that is close to power source, floor drain
and water utilization point. The heater should not be installed in places filled with fumes, strong
electromagnetic waves, high fluctuations of power voltage, acid or alkaline vapor. The air inlet of the
heat pump system

6
.
.
Notice:
Mounting Procedures and Precautions
z
.
.
z
zThe heater should not be located outdoors or in a freezing environment. If freezing occurs, the
tank and water pipe may break, therefore be in the risk of scalds or leakage.
zThe heater could be installed in half-hidden style. Refer to Fig.3
Fig.3 Installation
z
Using an inner hexangular spanner and expansion screw to fix hook on wall.
zUsing an inner hexangular spanner and expansion screw to fix hook on wall.
50mm
Water Heater
Gusset Plate Movable Gusset Plate
Movable Gusset Plate
should be available as water may be discharged through relief valve or discharge pipe during the
operation of the system. The installation place should ensure no damage to surroundings or downs-
tairs in case of leakage of heater or joint. Make sure to install inlet, outlet and discharge pipe under
the heater.
Vertical installation of the water heater is strictly prohibited.
Make sure to use original accessories to install the heater. Do not mount the heater
until accessories are fixed on wall, or it may fall down and cause accident.
Independent branch of circuit with diameter of wire no less than 2.5mm is
suggested, as max input power of the heater is 2.5kW.
Ensure mounting wall can afford at least four times the weight of the heat pump water heater
full of water. Corresponding protective measures such as bracket is essential when install on
nonbearing wall.
In order to easily open side cover for maintenance or resetting high temp limit switch and for
fine air movement required by heat pump system, please ensure 300 mm (at least 50mm) or
more distance between wall and right side of heater, between which there should also be no
curtain, towel and anything that could be moved by blow. If the heater is embedded into a
gusset plate, the plate on the right side should be moveable for easy repair and maintenance.
Refer to Fig.3 for details.

7
L
L(mm)
HPW-60AT/AE 260
380HPW-80AT/AE
Fig.4 Distance betweenAppearance Features
Notice: Before insert screw into punching, a nylon expansion tube wire should get through
the hole of hook first.
Use an inner hexangular spanner to screw in, and other tooling are suitable. .
Ensure the counter sunk head of the screw is not over-tightened Match up two sets
of hooks and holes of hanging panels to the back of the heater, and then move the
heater down to get fixed.
.
Fig.5 Proper Improper
Notice:
Original installation accessories should be used on solid wall. The heater may
have has risk of fall in case of improper installation. Refer to Fig.5.
Mounting Consolidation
Consolidation is essential when install the heater on nonbearing wall. Refer to Fig.6.
Fig.6 Mounting Consolidation
Fix hanging panels on the wall
Model
Non bearing wall

8
Caution: When install leakage protection power cord, please refer to Fig.6 to prevent water flow
along power cord to plug and socket.
Pipe Connection
.
.
Safety Valve
Hot Water (Outlet)
Cold Water
(Inlet)
Water Mixture
Valve
Handle
Three-pass Discharge Pipe
Discharge Pipe
toward Floor Drain
Fig.7 Pipe Connection
Notice: Thread sealing tape or seal ring is essential for pipe connection joint for leakage-
proof purpose. Do not over-tighten the safety valve or it may get damaged.
Three-pass Discharge Pipe Connection
Condensate Water Pipe Connection
Power Connection
Power cord and plug are equipped with the water, please ensure plug and socket are fitting.
Connect a safety valve to the inlet tube (i.e. blue cap side) of heater, keeping arrow accord with water
flow (i.e. toward the heater) (Refer to Fig.7 for more detail). Connect a discharge pipe with safety
valve. Connect the hot water pipe to the outlet tube (i.e. red cap side).
For safety valve installation, please refer to chapter of “Safety Feature". If water pressure of inlet
pipe approaches or even exceeds relief point (0.8MPa) of the safety valve, please install a decom-
pression valve on the water inlet pipe away from the heater.
Water pipe and heater are only permitted to be connected by PPR pipe.
After mounting of the heater, use three-pass discharge pipe to connect safety valve and discharge-
pipe as per Fig.7.
Ensure three-pass discharge pipe, connected with condensate water outlet, is unobstructed and
toward floor drain.

9
Notice:
-
Water Filling
Remote Controller
User could fix remote controller on the wall near the heater with bracket if needed.
Remote Controller Bracket Installation
zRemote controller bracket should be located at a dry place. .
zFitremote controller with battery into the bracket.
Remote Controller Battery Installation
zUse a coin to remove battery cover in back of controller in anticlockwise direction.

zUse a coin to fix battery cover in clockwise direction.
zPut CR2025 battery (in accessories) into controller, with "+" polar upwards.
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distance should be 28mm (Refers to Fig.8). Use expansion pipes and screws (in accessories) to
fix bracket on the wall..
Ensure that the heater and socket are both reliably grounded. Use an independent
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between plug and socket.
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tank with water until water flowing smoothly through outlet pipe, which means the tank is full of
water. Shut off the outlet valve, and check if there is any leakage at joints. If yes, evacuate the tank,
fix joints and repeat until no leakage appears.

10
Operation Instructions
Notice:
Indicator ofheating.
Indicator ofhot water amount
Increase button Decrease button Power On/Off
1. Initial Power On
:
2. Power On / Off
Fig.10
Fig.9
Before initial power on, ensure the tank full of water, plug and socket connected
properly, and the heater laid for at least 30 min after installation.
For the first-ever power connection, electronic controller will run self-inspection program. All
indicators on the screen will light up and last for a few minutes and then power-off.
Notice:When water heater is disconnected with power supply by plug-out or power cut, the tempera-
ture, timer-1, timer-2, AES and MAX will load status before the break. By power-on more than 4
hours, the heater could keep clock setting information for 72 hours when power supply is cut-off.
Press Power ON/OFF button , the heater will be power-on. Setting temp and actual temp will be
displayed a few seconds later.
When heater is power on, pressing Power ON/OFF button turn the heater into power-off status.
(Refer to Fig.10.)
Default setting: Efficiency Mode , MAX on, Setting Temp at 70 ℃, Setting Clock at
12:00.
Electronic Controller Operation

11
3. Clock Setting (Fig.11)
.
4. Temperature Setting (Fig.12, 13)
With heater power on, user could press or to set temperature within the range form 35℃to
75 ℃.
.
5. Timing
Prior to timing, clock should be set. With heater power on, user could change the status among
“Clock display”, “Timer-1”, “Timer-2”, “Timer-1 and Timer-2” and off by touching .
z
Fig.11
Fig.12
Fig.13
Fig.14
Timer-2 (Fig.14)
With heater power on, by one-touch on button, clock will be displayed for 10 seconds.
With timer-1 and timer-2 off, pressing and hold button for a few seconds will enter clock setting
status. With hour digit flashing, user could press or to set hour digit within the range form 0
to 23. With minute digit flashing, user could press or to set minute digit within the range form
0 to 59. User could change the status among hour digit, minute digit and exit by touching .
With Timer-1 indicator light up, user could press and hold button to enter Timer-2 setting
status. With“TIME ON” and flashing, user could press or to increase or decrease “TIME
ON” by 30 minutes. With “TIME OFF” and flashing, user could increase or decrease “TIME
OFF” in the similar way. User could change the status among time-on, time off and exit by touching
.

z
Timer-1 (Fig.15)
Notice:
12
z
Default Timer-1: 21:00-08:00;
z Default Timer-2: 12:00-21:00;
z Available Period of Time On: 21:00-7:30;
z Available Period of Time O: 30 minutes after Time On to 8:00;
z With indicator of both Timer-1 and Timer-2 light up, water heater will work in both periods;
z Neither Timer-1 nor Timer-2 could work simultaneously with AES, that means once Timer-1 or
Timer-2 turns on, AES will turn o automatically.
Fig.15
6. Heating Mode
In Eciency mode, the heater is heating highly-eciently;
In Hybrid Turbo mode, the heater is heating both eciently and rapidly.
Notice:
z When choose Eciency mode, heater will not work until 3 minutes after power on;
Fig.16
Fig.17
With Timer-1 indicator light up, user could press and hold button to enter Timer-1 setting
status, and set in the same way of Timer-1.
With heater power on, choose mode of Eciency or Hybrid Turbo by touch Mode button
(Fig.16 & 17) ;
z
If rapid heating is needed, please choose Hybrid Turbo mode or choose Instant mode by touch
button . (Refer to 9. Instant heating)
7. MAX&AES
User could change the status among “MAX”, “AES”, “MAX and AES” and o by touching .
Notice:
AES could not work simultaneously with any Timer, which means once AES turns on, Timer will
turn o automatically.

13
9. Indicator of hot water amount
10. Reset
Electric Leakage Inspection
Remote Controller (Fig. 18)
Fig. 18
8. Instant Heating
When power on, users could touch to turn on “Instant heating” with ashes for three
times. Once reach setting temp, the heater will automatically change back to the mode before
“Instant heating”.
When “Instant heating” mode is on, users could touch to turn o“Instant heating” with
ashes just for one time.
Five blocks of light indicates the hot water amount available in tank. Based on your setting
temp,red blocks mean more hot water available than orange ones, which in turn mean more
hot water available than green ones.
Reset may help heater recover from misoperation or fault. Press and hold both and
simultaneously for 8 seconds, will turn o the heater after 2 seconds display o all characters on
screen, and reset setting temp, clock, timer to default status and remove AES memory.
In case of any unsafety detected, tri-polar power-o protection system will cut o power connec-
tion, with “reset” button popup and power indicator turned from green into orange.Please try to
push reset button, if it does not work, contact local authorized dealer.
Notice:
User should check the tri-polar power-o protection system regularly as follow: With power
indicator initially in green, press “Test” button to turn it o, and press “reset” button to turn it
back to green. Otherwise, contact local authorized dealer.
The function and operation of button on remote controller are similar
with the ones on electronic controller on theheater.
Install battery before use remote controller. (Refer to ChapterInstalla-
tion Instructions)
Please change battery if indicator dose not ash when press any button.
Using remote controller toward the receiver on water heater, and keep
distance within 4 meters.
z
z
z
z
Safety Valve Inspection
Safety valve is a kind of protection device against overpressure, thus it is a normal phenomenon
to see water discharged from safety valve when water pressure rises over 0.8Mpa due to heating
or supply reason.
NOTICE: User should check safety valve regularly as follow: open handle on safety valve to get rid
of the calcium carbonate deposit and etc., if water dose not discharge from valve, please contact
local authorized dealer.

14
Maintenance Instructions
Maintenance
Fig. 19 Fig. 20
Direction-1
Direction-2
Direction-3
Edge of Air Filter Edge of Cover
Only authorized service sta is permitted for maintenance service.
Improper maintenance may have risk of serious injury or property
damage.
z
Drain the tank if needed: Close water inlet valve, rotate the handle on safety valve, release
the nut connected to joint of tank, and drain water through discharge pipe.
z Clean the tank regularly.
(1) Cut o power.
(2) Screw o safety valve and remove inlet tube on the heater.
(3) Connect water outlet pipe with tap water, ll water through this end. Connectwater inlet
pipe.
with oor drain, discharge water through this end.
(4) Open water inlet valve to get maximum tap water ow, ush the tank until clean water come
out of tank.
(5) Connect water inlet and outlet pipes referring to Fig.7, and check if there is leakage.
Warning: Ensure heater is disconnected from power source before maintenance to avoid
electric shock.
Notice: User may do some easy repair works referring to the trouble shooting chart,
before contact local authorized dealer.
Declaration:
Notice: Be cautious about the hot water discharged from the tank, as it may have risk
to cause scald.
z
Clean air lter semiannually to avoid block, which may aect heating eciency.
(1) Disassembling air lter (refer to Fig. 19). Hold the wedging block on edge of air lter
(nearby mark of “PUSH”), pull toward right side of heater (Direction-1) softly, and pull the
whole lter downward (Direction-2) slowly.
(2) Wash air lter by water and dry.
(3) Assembling air lter (refer to Fig. 20). Insert air lter upward (Direction-3) to fulll the
cover gap and press lter to get xed.

15
Troubleshooting
Problem
Potential Cause Corrective Action
No Display
No Hot Water
Water heater power off
No power available in electric socket
Failure in control circuit or internal wiring
Power on water heater
Check electric socket
Contact local a uthorized dealer
No Display
Overtemperature Water High temp limit switch open
Power board failure Contact local authorized dealer
Display
No Hot Water Heating element or internal wiring failure Contact local authorized dealer
Leakage in Tube Joint Unsealed tube joint. Reinstall pipe using thread seal tape or
ring
Leakage in Jacket
Tank or accessories leakage
Water collector blocked
Condensation pipe distorted or not
downward
Cut off power.
Check if condensation pipe is distorted or
not downward
Contact local authorized dealer
Display "E1" Black wiring with two-core terminal short
circuit or open circuit Contact local authorized dealer
Display "E2" White wiring with two-core terminal short
circuit or open circuit Contact local a
uthorized dealer
Display "E6" Red wiring with two-core terminal short
circuit or open circuit Contact local authorized dealer
Display "E7" Blue wiring with two-core terminal short
circuit or open circuit Contact local authorized dealer
Display "H6" Green wiring with six-core terminal short
circuit or open circuit Contact local authorized dealer
Display "H7" Blue wiring with six-core terminal short
circuit or open circuit Contact local authorized dealer
Display "H8" Yellow wiring with six-core terminal short
circuit or open circuit Contact local authorized dealer
Display
"EA/EB/ED/EE" Heating element failure Contact local authorized dealer
Display "EO" PCB failure Contact local authorized dealer
Abnormal Noise Interfere among internal components
Compressor not installed horizontally Contact local authorized dealer
"Reset" button popup,
with indicator light up in
orange, unable to
restore.
Fault in grounding system including both
internal and external area of the heater Cut off power immediately,
and contact
local authorized dealer
Sound at Runtime
Normal sounds of water heater in mode of efficiency include:
Sound of fan and compressor running;
Sound of refrigerant flowing;
Sound of relay acting.

16
Wiring Diagram
Fig.21 Wiring Diagram
UP Red
RS
C
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:KLWH
Compressor
%ODFN
&DSDFLWRU Compressor
protector
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17
Part List
Warning
!!
2
3
4
5
6
7
User Guide
Safety Valve
Hanging Panel Accessories
Remote Controller
Discharge Pipe
2
Serial
number !!
2
3
4
5
6
7
Heat Pump Water Heater 2
2
2
2
2
2
Three-pass Discharge Pipe
82
Name Quantity
z
Before installation, check and conrm if water heater power, electricity meter and wiring
match up with each other.
The heat pump water heater should be grounded reliably. It is prohibited to connect the
earth wire to neutral wire or tap water pipe.
Water of 50℃or above may have risk of scald. Please check water temp by hand and use
water mixing valve to get water in appropriate temperature
Be cautious about the hot water discharge through safety valve, as it may have risk to cause
scald.
For any damage of power cord, please contact local authorized dealer for replacement.
z
z
z
z